Tolppanen, Anna-Maija <br/><br/>
Risk factors for variation in 25-hydroxyvitamin D₃ and D₂ concentrations and vitamin D deficiency in children.  [electronic resource] 

 -  The Journal of clinical endocrinology and metabolism  Apr 2012 
 - 1202-10 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1945-7197 
<br/><br/><label>Standard No.: </label>10.1210/jc.2011-2516  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>25-Hydroxyvitamin D 2--blood<br/>Calcifediol--blood<br/>Child<br/>Child, Preschool<br/>Cohort Studies<br/>England--epidemiology<br/>Female<br/>Humans<br/>Longitudinal Studies<br/>Male<br/>Prevalence<br/>Prospective Studies<br/>Puberty<br/>Risk Factors<br/>Seasons<br/>Severity of Illness Index<br/>Sex Factors<br/>Socioeconomic Factors<br/>Sunlight<br/>Vitamin D Deficiency--blood